diff --git a/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanFactoryPostProcessor.java b/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanFactoryPostProcessor.java
index fe773ce2df..65e249b15b 100644
--- a/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanFactoryPostProcessor.java
+++ b/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanFactoryPostProcessor.java
@@ -1,14 +1,21 @@
 package com.baeldung.ioccontainer.bean;
 
-import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.config.BeanFactoryPostProcessor;
 import org.springframework.beans.factory.config.ConfigurableListableBeanFactory;
 
 public class CustomBeanFactoryPostProcessor implements BeanFactoryPostProcessor {
-    public static boolean isBeanInstantiated = false;
+    private static boolean isBeanFactoryPostProcessorRegistered = false;
     
     @Override
-    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory) throws BeansException {
-        isBeanInstantiated = true;
+    public void postProcessBeanFactory(ConfigurableListableBeanFactory beanFactory){
+        setBeanFactoryPostProcessorRegistered(true);
+    }
+
+    public static boolean isBeanFactoryPostProcessorRegistered() {
+        return isBeanFactoryPostProcessorRegistered;
+    }
+
+    public static void setBeanFactoryPostProcessorRegistered(boolean isBeanFactoryPostProcessorRegistered) {
+        CustomBeanFactoryPostProcessor.isBeanFactoryPostProcessorRegistered = isBeanFactoryPostProcessorRegistered;
     }
 }
diff --git a/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanPostProcessor.java b/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanPostProcessor.java
index 1c2e011a6c..6f99a5f0db 100644
--- a/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanPostProcessor.java
+++ b/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/CustomBeanPostProcessor.java
@@ -1,14 +1,21 @@
 package com.baeldung.ioccontainer.bean;
 
-import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.config.BeanPostProcessor;
 
 public class CustomBeanPostProcessor implements BeanPostProcessor {
-    public static boolean isBeanInstantiated = false;
+    private static boolean isBeanPostProcessorRegistered = false;
     
     @Override
-    public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
-        isBeanInstantiated = true;
+    public Object postProcessBeforeInitialization(Object bean, String beanName){
+        setBeanPostProcessorRegistered(true);
         return bean;
     }
+
+    public static boolean isBeanPostProcessorRegistered() {
+        return isBeanPostProcessorRegistered;
+    }
+
+    public static void setBeanPostProcessorRegistered(boolean isBeanPostProcessorRegistered) {
+        CustomBeanPostProcessor.isBeanPostProcessorRegistered = isBeanPostProcessorRegistered;
+    }
 }
diff --git a/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/Student.java b/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/Student.java
index 03e0b049ba..404f323b66 100644
--- a/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/Student.java
+++ b/spring-core-3/src/main/java/com/baeldung/ioccontainer/bean/Student.java
@@ -1,9 +1,17 @@
 package com.baeldung.ioccontainer.bean;
 
 public class Student {
-    public static boolean isBeanInstantiated = false;
+    private static boolean isBeanInstantiated = false;
 
     public void postConstruct() {
-        isBeanInstantiated = true;
+        setBeanInstantiated(true);
+    }
+
+    public static boolean isBeanInstantiated() {
+        return isBeanInstantiated;
+    }
+
+    public static void setBeanInstantiated(boolean isBeanInstantiated) {
+        Student.isBeanInstantiated = isBeanInstantiated;
     }
 }
diff --git a/spring-core-3/src/test/java/com/baeldung/ioccontainer/IOCContainerAppUnitTest.java b/spring-core-3/src/test/java/com/baeldung/ioccontainer/IOCContainerAppUnitTest.java
index 3c0a5b3dbe..e9b491813e 100644
--- a/spring-core-3/src/test/java/com/baeldung/ioccontainer/IOCContainerAppUnitTest.java
+++ b/spring-core-3/src/test/java/com/baeldung/ioccontainer/IOCContainerAppUnitTest.java
@@ -23,9 +23,9 @@ public class IOCContainerAppUnitTest {
     @BeforeEach
     @AfterEach
     public void resetInstantiationFlag() {
-        Student.isBeanInstantiated = false;
-        CustomBeanPostProcessor.isBeanInstantiated = false;
-        CustomBeanFactoryPostProcessor.isBeanInstantiated = false;
+        Student.setBeanInstantiated(false);
+        CustomBeanPostProcessor.setBeanPostProcessorRegistered(false);
+        CustomBeanFactoryPostProcessor.setBeanFactoryPostProcessorRegistered(false);
     }
 
     @Test
@@ -33,24 +33,23 @@ public class IOCContainerAppUnitTest {
         Resource res = new ClassPathResource("ioc-container-difference-example.xml");
         BeanFactory factory = new XmlBeanFactory(res);
         
-        assertFalse(Student.isBeanInstantiated);
+        assertFalse(Student.isBeanInstantiated());
     }
 
     @Test
     public void whenBFInitialized_thenStudentInitialized() {
-    
         Resource res = new ClassPathResource("ioc-container-difference-example.xml");
         BeanFactory factory = new XmlBeanFactory(res);
         Student student = (Student) factory.getBean("student");
     
-        assertTrue(Student.isBeanInstantiated);
+        assertTrue(Student.isBeanInstantiated());
     }
     
     @Test
     public void whenAppContInitialized_thenStudentInitialized() {
         ApplicationContext context = new ClassPathXmlApplicationContext("ioc-container-difference-example.xml");
         
-        assertTrue(Student.isBeanInstantiated);
+        assertTrue(Student.isBeanInstantiated());
     }
 
     @Test
@@ -58,16 +57,8 @@ public class IOCContainerAppUnitTest {
         Resource res = new ClassPathResource("ioc-container-difference-example.xml");
         ConfigurableListableBeanFactory factory = new XmlBeanFactory(res);
 
-        assertFalse(CustomBeanFactoryPostProcessor.isBeanInstantiated);
-        assertFalse(CustomBeanPostProcessor.isBeanInstantiated);
-    }
-
-    @Test
-    public void whenAppContInitialized_thenBFPostProcessorAndBPostProcessorRegisteredAutomatically() {
-        ApplicationContext context = new ClassPathXmlApplicationContext("ioc-container-difference-example.xml");
-
-        assertTrue(CustomBeanFactoryPostProcessor.isBeanInstantiated);
-        assertTrue(CustomBeanPostProcessor.isBeanInstantiated);
+        assertFalse(CustomBeanFactoryPostProcessor.isBeanFactoryPostProcessorRegistered());
+        assertFalse(CustomBeanPostProcessor.isBeanPostProcessorRegistered());
     }
 
     @Test
@@ -77,12 +68,19 @@ public class IOCContainerAppUnitTest {
 
         CustomBeanFactoryPostProcessor beanFactoryPostProcessor = new CustomBeanFactoryPostProcessor();
         beanFactoryPostProcessor.postProcessBeanFactory(factory);
-        assertTrue(CustomBeanFactoryPostProcessor.isBeanInstantiated);
+        assertTrue(CustomBeanFactoryPostProcessor.isBeanFactoryPostProcessorRegistered());
 
         CustomBeanPostProcessor beanPostProcessor = new CustomBeanPostProcessor();
         factory.addBeanPostProcessor(beanPostProcessor);
         Student student = (Student) factory.getBean("student");
-        assertTrue(CustomBeanPostProcessor.isBeanInstantiated);
+        assertTrue(CustomBeanPostProcessor.isBeanPostProcessorRegistered());
     }
+    
+    @Test
+    public void whenAppContInitialized_thenBFPostProcessorAndBPostProcessorRegisteredAutomatically() {
+        ApplicationContext context = new ClassPathXmlApplicationContext("ioc-container-difference-example.xml");
 
+        assertTrue(CustomBeanFactoryPostProcessor.isBeanFactoryPostProcessorRegistered());
+        assertTrue(CustomBeanPostProcessor.isBeanPostProcessorRegistered());
+    }
 }